CN108873247A - Imaging lens assembly, image capturing device and electronic device - Google Patents

Abstract

The invention discloses an imaging lens assembly, an image capturing device and an electronic device. The imaging lens assembly includes six lens elements, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has negative refractive power. The second lens element has positive refractive power. The fifth lens element with positive refractive power. When a specific condition is satisfied, a miniaturized configuration can be achieved, the sensitivity is reduced, and the lens manufacturing yield is improved. The invention also discloses an image capturing device with the imaging lens system group and an electronic device with the image capturing device.

Description

Imaging system lens group, imaging device and electronic device

technical field

The present invention relates to an imaging system lens set and an image capturing device, and in particular to a wide viewing angle imaging system lens set and an image capturing device applied to an electronic device.

Background technique

In response to more diverse market demands, the specifications of photographic modules are becoming increasingly stringent. Traditional lenses are limited by the mirror shape and lens material changes, making it difficult to reduce the size of the product. Moreover, there are differences between lens molding, assembly convenience, and sensitivity. In addition, under different environmental conditions, maintaining the normal operation of the lens and good image quality is one of the indispensable elements of the current camera module. Therefore, only a lens with sufficient angle of view, miniaturization, resistance to environmental changes and high imaging quality can meet the specifications and demands of the future market.

Contents of the invention

The imaging system lens group, imaging device and electronic device provided by the present invention can achieve the characteristics of sufficient viewing angle, miniaturization, resistance to environmental changes, and high imaging quality through proper configuration of optical and structural components, and then develop into a A mass-produced and affordable imaging device can be used in a wider range of electronic devices.

According to the present invention, an imaging system lens group is provided, which includes six lenses, and the six lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a lens from the object side to the image side. Sixth lens. The first lens has negative refractive power. The second lens has positive refractive power. The third lens has negative refractive power. The fifth lens has positive refractive power. The focal length of the fifth lens is f5, the thickness of the second lens on the optical axis is CT2, the radius of curvature of the image-side surface of the second lens is R4, and the radius of curvature of the object-side surface of the third lens is R5, which satisfy the following conditions:

0.10<f5/CT2<1.20; and

(R4+R5)/(R4-R5)<0.75.

According to the present invention, there is also provided an imaging system lens group, which includes six lenses, and the six lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, and a fifth lens from the object side to the image side. and a sixth lens. The first lens has negative refractive power. The second lens has positive refractive power. The fifth lens has positive refractive power. The near optical axis of the image side surface of the sixth lens is convex. The focal length of the fifth lens is f5, the thickness of the second lens on the optical axis is CT2, the curvature radius of the object-side surface of the third lens is R5, the curvature radius of the image-side surface of the third lens is R6, and the object-side surface of the fourth lens is The radius of curvature of is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, which satisfy the following conditions:

0.10<f5/CT2<1.40;

0.45<(R5+R6)/(R5-R6); and

(R7+R8)/(R7-R8)<1.50.

According to the present invention, there is also provided an image capturing device, comprising the imaging system lens group and the electronic photosensitive element as mentioned in the preceding paragraph, wherein the electronic photosensitive element is arranged on the imaging surface of the imaging system lens group.

According to the present invention, an electronic device is further provided, including the imaging device as mentioned in the preceding paragraph.

According to the present invention, there is also provided an imaging system lens group, which includes six lenses, and the six lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, and a fifth lens from the object side to the image side. and a sixth lens. The first lens has negative refractive power. The second lens has positive refractive power. The third lens has negative refractive power. The fifth lens has positive refractive power. The radius of curvature of the object side surface of the third lens is R5, the radius of curvature of the image side surface of the third lens is R6, the focal length of the fifth lens is f5, the thickness of the second lens on the optical axis is CT2, the first lens and the second The distance between the lenses on the optical axis is T12, which satisfies the following conditions:

-3.50<(R5+R6)/(R5-R6); and

0.50<f5/CT2+f5/T12<2.50.

When f5/CT2 meets the above conditions, the ratio of the refractive power of the fifth lens to the thickness of the second lens on the optical axis can be controlled, and the miniaturization can be achieved through the configuration of sufficient refractive power. On the other hand, the second lens can be adjusted The thickness can effectively reduce the sensitivity, facilitate the incidence of light with a large viewing angle, and also improve the pass rate of the lens.

When (R4+R5)/(R4-R5) satisfies the above conditions, by adjusting the surface shape change between the image-side surface of the second lens and the object-side surface of the third lens, the incidence of light with a large viewing angle can be assisted, and it can also be corrected The spherical aberration of the lens group of the imaging system meets the requirements of wide viewing angle and high imaging quality.

When (R5+R6)/(R5-R6) satisfies the above conditions, the lens shape of the third lens can be controlled, which is conducive to correcting the spherical aberration of the lens group of the imaging system and helping light with a large viewing angle to enter it.

When (R7+R8)/(R7-R8) satisfies the above conditions, the lens shape of the fourth lens can be controlled, the aberration of the lens group of the imaging system can be effectively corrected, and the imaging quality can be improved.

When f5/CT2+f5/T12 meet the above conditions, the refractive power strength of the fifth lens, the thickness of the second lens and the distance between the first lens and the second lens can be adjusted synchronously, effectively balancing the space utilization efficiency of the lens group of the imaging system, and It is beneficial to strike the right balance between miniaturization, sensitivity and assembly yield.

Description of drawings

FIG. 1 shows a schematic diagram of an imaging device according to a first embodiment of the present invention;

Fig. 2 is the spherical aberration, astigmatism and distortion curves of the first embodiment in order from left to right;

3 shows a schematic diagram of an imaging device according to a second embodiment of the present invention;

Fig. 4 is the spherical aberration, astigmatism and distortion curves of the second embodiment in sequence from left to right;

5 shows a schematic diagram of an imaging device according to a third embodiment of the present invention;

Fig. 6 is the spherical aberration, astigmatism and distortion curves of the third embodiment in order from left to right;

7 is a schematic diagram of an imaging device according to a fourth embodiment of the present invention;

Fig. 8 is the spherical aberration, astigmatism and distortion curves of the fourth embodiment in order from left to right;

9 is a schematic diagram of an imaging device according to a fifth embodiment of the present invention;

Fig. 10 is the spherical aberration, astigmatism and distortion curves of the fifth embodiment in order from left to right;

11 is a schematic diagram of an imaging device according to a sixth embodiment of the present invention;

Fig. 12 is the spherical aberration, astigmatism and distortion curves of the sixth embodiment in sequence from left to right;

13 is a schematic diagram of an imaging device according to a seventh embodiment of the present invention;

Fig. 14 is the spherical aberration, astigmatism and distortion curves of the seventh embodiment in sequence from left to right;

15 is a schematic diagram of an imaging device according to an eighth embodiment of the present invention;

Fig. 16 is the spherical aberration, astigmatism and distortion curves of the eighth embodiment in order from left to right;

17 is a schematic diagram of an imaging device according to a ninth embodiment of the present invention;

Fig. 18 is the spherical aberration, astigmatism and distortion curves of the ninth embodiment in sequence from left to right;

FIG. 19 shows a schematic diagram of inflection points of the fourth lens and the sixth lens according to the first embodiment of FIG. 1;

FIG. 20 is a schematic diagram of an electronic device according to a tenth embodiment of the present invention;

FIG. 21 is a schematic diagram of an electronic device according to an eleventh embodiment of the present invention; and

FIG. 22 is a schematic diagram of an electronic device according to a twelfth embodiment of the present invention.

【Symbol Description】

Electronics: 10, 20, 30

Image taking device: 11, 21, 31

Aperture: 100, 200, 300, 400, 500, 600, 700, 800, 900

Aperture: 301, 401, 501

First lens: 110, 210, 310, 410, 510, 610, 710, 810, 910

Object side surface: 111, 211, 311, 411, 511, 611, 711, 811, 911

Image side surface: 112, 212, 312, 412, 512, 612, 712, 812, 912

Second lens: 120, 220, 320, 420, 520, 620, 720, 820, 920

Object side surface: 121, 221, 321, 421, 521, 621, 721, 821, 921

Image side surface: 122, 222, 322, 422, 522, 622, 722, 822, 922

Third lens: 130, 230, 330, 430, 530, 630, 730, 830, 930

Object side surface: 131, 231, 331, 431, 531, 631, 731, 831, 931

Image side surface: 132, 232, 332, 432, 532, 632, 732, 832, 932

Fourth lens: 140, 240, 340, 440, 540, 640, 740, 840, 940

Object side surface: 141, 241, 341, 441, 541, 641, 741, 841, 941

Image side surface: 142, 242, 342, 442, 542, 642, 742, 842, 942

Fifth lens: 150, 250, 350, 450, 550, 650, 750, 850, 950

Object side surface: 151, 251, 351, 451, 551, 651, 751, 851, 951

Image side surface: 152, 252, 352, 452, 552, 652, 752, 852, 952

Sixth lens: 160, 260, 360, 460, 560, 660, 760, 860, 960

Object side surface: 161, 261, 361, 461, 561, 661, 761, 861, 961

Image side surface: 162, 262, 362, 462, 562, 662, 762, 862, 962

Filter elements: 170, 270, 370, 470, 570, 670, 770, 870, 970

Imaging surface: 180, 280, 380, 480, 580, 680, 780, 880, 980

Electronic photosensitive element: 190, 290, 390, 490, 590, 690, 790, 890, 990

Inflection point: IP42, IP61, IP62

f: focal length of the lens group of the imaging system

Fno: the aperture value of the lens group of the imaging system

HFOV: half of the maximum angle of view in the imaging system lens group

V2: Dispersion coefficient of the second lens

V3: Dispersion coefficient of the third lens

V6: Dispersion coefficient of the sixth lens

N1: Refractive index of the first lens

N2: Refractive index of the second lens

R3: The radius of curvature of the object-side surface of the second lens

R4: Radius of curvature of the image-side surface of the second lens

R5: Radius of curvature of the object-side surface of the third lens

R6: Radius of curvature of the image-side surface of the third lens

R7: Radius of curvature of the object-side surface of the fourth lens

R8: Radius of curvature of the image-side surface of the fourth lens

TL: the distance from the object-side surface of the first lens to the imaging plane on the optical axis

T12: the distance between the first lens and the second lens on the optical axis

T56: the distance between the fifth lens and the sixth lens on the optical axis

CT2: The thickness of the second lens on the optical axis

CT6: The thickness of the sixth lens on the optical axis

f5: focal length of the fifth lens

fG1: The overall focal length of the lens from the subject to the aperture

fG2: The overall focal length of the lens from the aperture to the imaging surface

BL: the distance from the image-side surface of the sixth lens to the imaging surface on the optical axis

P3: Refractive power of the third lens

P4: Refractive power of the fourth lens

P5: The refractive power of the fifth lens

P6: The refractive power of the sixth lens

DsR5: the distance between the aperture and the object-side surface of the third lens on the optical axis

DsR6: the distance between the aperture and the image side surface of the third lens on the optical axis

Detailed ways

An imaging system lens group includes six lenses, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from the object side to the image side.

The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens of the imaging system lens group described in the preceding paragraph may all be single and non-cemented lenses; that is to say, the imaging system lens group Among the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens, there is an air space between any two adjacent lenses on the optical axis. Because the manufacturing process of cemented lenses is more complicated than that of non-cemented lenses, especially the bonding surface of the two lenses must have a high-precision curved surface in order to achieve high adhesion when the two lenses are bonded, and during the bonding process, it is also possible Poor adhesion due to misalignment affects the overall optical imaging quality. Therefore, in the lens set of the imaging system of the present invention, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens can all be single and non-cemented lenses, so as to effectively improve the cemented lens. the resulting problems.

The first lens has a negative refractive power, which can facilitate the formation of a short focal length lens structure, allowing light with a large viewing angle to enter the lens group of the imaging system, so as to expand the range of light collection and meet wider applications.

The second lens has a positive refractive power, which can balance the negative refractive power of the first lens, effectively alleviates the incident light with a large viewing angle and reduces the sensitivity of the lens group of the imaging system. The image-side surface of the second lens near the optical axis can be convex, and by controlling the shape of the image-side surface of the second lens, it can be beneficial to buffer the incident light of the first lens with a large viewing angle, and can further correct its aberration, so as to help realize the imaging system lens Features of wide viewing angle and high imaging quality.

The third lens can have a negative refractive power, and by controlling the configuration of the refractive power of the third lens, it can help to correct the aberration of the lens group of the imaging system and effectively improve the imaging quality. The image-side surface of the third lens near the optical axis may be a concave surface. By controlling the image-side surface shape of the third lens, it is beneficial to correct the spherical aberration of the imaging system lens group and help incident light with a large viewing angle enter the imaging system lens group.

The fourth lens can have positive refractive power, its object-side surface near the optical axis can be convex, and its image-side surface near the optical axis can be concave. By controlling the refractive power of the fourth lens, the overall refractive power configuration of the lens group of the imaging system can be balanced, the sensitivity can be effectively reduced, and the imaging quality can be optimized at the same time. Furthermore, by controlling the surface shape of the fourth lens, the lens group of the imaging system can be effectively compressed. The overall length also helps to correct aberrations. In addition, at least one surface of the fourth lens may include at least one inflection point. Thereby, the change of the surface shape of the fourth lens can be adjusted, which helps to correct the off-axis aberration of the lens group of the imaging system, and can also shorten its total length.

The fifth lens has a positive refractive power, which can provide the main light-gathering ability of the lens group of the imaging system, which is beneficial to shorten its total length and achieve the purpose of miniaturization of the lens group of the imaging system. The object-side surface of the fifth lens may be convex near the optical axis and may include at least one concave surface off-axis. In this way, adjusting the shape change of the fifth lens surface can help to suppress the incident angle of the off-axis field of view on the imaging surface to maintain the imaging illumination, and help to correct the off-axis aberration of the lens group of the imaging system and improve the imaging quality.

The near optical axis of the object-side surface of the sixth lens can be concave. By controlling the shape of the object-side surface of the sixth lens, it can help to correct the astigmatism of the lens group of the imaging system and maintain the imaging quality. The image-side surface of the sixth lens near the optical axis can be convex. By controlling the shape of the image-side surface of the sixth lens, it can be beneficial to have a sufficient back focus, thereby improving the illumination of the imaging surface, and also helping to increase the flexibility of mechanism design. In addition, at least one surface of the sixth lens may include at least one inflection point. Therefore, by adjusting the surface shape of the sixth lens, it can be beneficial to receive peripheral light, avoid stray light generated by excessive incident angle of light, and help to suppress the angle of off-axis field of view incident on the imaging surface to maintain imaging illuminance , to further optimize the image quality.

At least one surface of at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may include at least one inflection point. By setting the lens surface shape with inflection points, the number of lenses can be reduced while ensuring the imaging quality of peripheral images, thereby shortening the total length and achieving the purpose of miniaturization.

At least three of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are made of plastic material. Therefore, properly disposing the materials between the lenses can effectively reduce the cost and facilitate miniaturization.

The focal length of the fifth lens is f5, and the thickness of the second lens on the optical axis is CT2, which satisfies the following condition: 0.10<f5/CT2<1.40. In this way, controlling the ratio of the refractive power strength of the fifth lens to the thickness ratio of the second lens on the optical axis can achieve the purpose of miniaturization through the configuration of sufficient refractive power. On the other hand, adjusting the thickness of the second lens can effectively reduce the sensitivity , which is conducive to the incidence of light with a large viewing angle, and can also improve the pass rate of the lens. Preferably, the following condition can be satisfied: 0.10<f5/CT2<1.20. More preferably, the following condition can be satisfied: 0.20<f5/CT2<0.90.

The radius of curvature of the image-side surface of the second lens is R4, and the curvature radius of the object-side surface of the third lens is R5, which satisfy the following condition: (R4+R5)/(R4-R5)<0.75. By adjusting the surface shape change between the image-side surface of the second lens and the object-side surface of the third lens, it can assist the incidence of light with a large viewing angle, and at the same time correct the spherical aberration of the lens group of the imaging system to meet the requirements of wide viewing angle and high imaging quality. . Preferably, the following condition can be satisfied: -3.0<(R4+R5)/(R4-R5)<0.50.

The radius of curvature of the object-side surface of the third lens is R5, and the curvature radius of the image-side surface of the third lens is R6, which satisfy the following condition: -3.50<(R5+R6)/(R5-R6). In this way, controlling the lens shape of the third lens is beneficial to correcting the spherical aberration of the lens group of the imaging system and helping light with a large viewing angle to enter it. Preferably, the following condition can be satisfied: -0.30<(R5+R6)/(R5-R6). More preferably, the following condition can be satisfied: 0.45<(R5+R6)/(R5-R6). In addition, the following condition can be satisfied: 1.0<(R5+R6)/(R5-R6)<4.50.

The radius of curvature of the object-side surface of the fourth lens is R7, and the curvature radius of the image-side surface of the fourth lens is R8, which satisfy the following condition: (R7+R8)/(R7-R8)<1.50. Thereby, controlling the lens shape of the fourth lens can effectively correct the aberration of the lens group of the imaging system and improve the imaging quality. Preferably, the following condition can be satisfied: -5.0<(R7+R8)/(R7-R8)<0.75.

The focal length of the fifth lens is f5, the thickness of the second lens on the optical axis is CT2, and the distance between the first lens and the second lens on the optical axis is T12, which satisfies the following conditions: 0.30<f5/CT2+f5/ T12<3.50. In this way, synchronously adjusting the refractive strength of the fifth lens, the thickness of the second lens, and the distance between the first lens and the second lens can effectively balance the space utilization efficiency of the lens group of the imaging system, so as to facilitate miniaturization, sensitivity and qualified assembly. strike an appropriate balance between rates. Preferably, the following condition can be satisfied: 0.50<f5/CT2+f5/T12<2.50.

The radius of curvature of the image-side surface of the second lens is R4, and the curvature radius of the image-side surface of the third lens is R6, which satisfy the following condition: -0.30<(R4+R6)/(R4-R6)<0.75. By adjusting the surface shape change between the image-side surface of the second lens and the image-side surface of the third lens, it can help light with a large viewing angle to propagate in the lens group of the imaging system, and help to correct its aberration and balance its wide viewing angle and low sensitivity. Accuracy and good image quality characteristics. Preferably, the following condition can be satisfied: 0.15<(R4+R6)/(R4-R6)<0.75.

Half of the maximum viewing angle in the lens group of the imaging system is HFOV, which satisfies the following condition: 1/|tan(HFOV)|<1.20. Thereby, the field of view angle can be effectively increased, and the application range of the product can be expanded. Preferably, the following condition can be satisfied: 1/|tan(HFOV)|<0.85. More preferably, the following condition can be satisfied: 1/|tan(HFOV)|<0.70.

The lens group of the imaging system may further include an aperture, which may be disposed on the object side of the third lens. By controlling the position of the aperture, the efficiency of receiving images by the photosensitive element can be effectively increased while maintaining a sufficient viewing angle.

The integrated focal length of the lens from the subject to the aperture is fG1, and the integrated focal length of the lens from the aperture to the imaging plane is fG2, which satisfies the following conditions: 0<fG2/fG1<2.0. By adjusting the refractive power configuration of the object-side end and the image-side end of the lens group of the imaging system, an appropriate balance can be achieved between maintaining miniaturization and a large viewing angle. Preferably, the following condition can be satisfied: 0<fG2/fG1<1.0.

The focal length of the lens group of the imaging system is f, and the distance on the optical axis from the object-side surface of the first lens to the imaging plane is TL, which satisfies the following conditions: 0<f/TL<0.20. In this way, the characteristics of short focal length of the lens group of the imaging system can be strengthened, and the imaging range can be effectively expanded, so as to be applied to more diverse electronic devices.

The aperture value of the lens group of the imaging system is Fno, which satisfies the following condition: 1.0<Fno<3.0. In this way, the amount of incoming light can be controlled, which can help improve the illumination of the imaging surface, so that the imaging device including the lens group of the imaging system can be used in situations such as insufficient external light sources (such as at night) or dynamic photography (short exposure time). Enough information can still be obtained, and the electronic device including the image capturing device can still obtain images of a certain quality after being processed by the processor, thereby increasing the use opportunities of the electronic device. Preferably, the following condition can be satisfied: 1.0<Fno<2.40.

The dispersion coefficient of the third lens is V3, which satisfies the following condition: 10.0<V3<30.0. In this way, controlling the material configuration of the third lens can effectively correct the chromatic aberration of the lens group of the imaging system, prevent overlapping images, and improve the imaging quality.

The curvature radius of the object-side surface of the second lens is R3, and the curvature radius of the image-side surface of the second lens is R4, which satisfy the following condition: 0<(R3-R4)/(R3+R4)<2.20. In this way, controlling the shape of the second lens can help to buffer the incident light with a large viewing angle, reduce the sensitivity of the lens assembly of the imaging system at the side of the object, and can also correct aberrations.

The focal length of the fifth lens is f5, and the distance between the first lens and the second lens on the optical axis is T12, which satisfies the following condition: 0.30<f5/T12<2.50. In this way, controlling the refractive power of the fifth lens can provide sufficient positive refractive power for the lens group of the imaging system, thereby shortening its total length. On the other hand, properly adjusting the distance between the first lens and the second lens can help form a short lens. The focal length structure enables it to have a sufficient viewing angle and at the same time improve the assembly pass rate.

The distance on the optical axis from the image-side surface of the sixth lens to the imaging plane is BL, and the thickness of the second lens on the optical axis is CT2, which satisfies the following condition: 0<BL/CT2<0.75. By adjusting the ratio of the back focal length of the lens group of the imaging system to the thickness ratio of the second lens on the optical axis, it is beneficial for the transmission of light with a large viewing angle in the lens group of the imaging system to achieve a proper balance between sensitivity, miniaturization and imaging illuminance.

The refractive power of the third lens is P3, the refractive power of the fourth lens is P4, the refractive power of the fifth lens is P5, and the refractive power of the sixth lens is P6, which satisfy the following conditions: (|P3|+|P4|+ |P6|)/|P5|<2.50. In this way, adjusting the refractive power configuration of the lenses at the image side of the lens group of the imaging system can strengthen the ability of the lens at the image side to correct aberrations and converge light, so as to take into account good imaging quality and maintain miniaturization, so that it can be used more widely. in the electronic device.

The dispersion coefficient of the second lens is V2, the dispersion coefficient of the third lens is V3, and the dispersion coefficient of the sixth lens is V6, which satisfy the following condition: 30.0<V2+V3+V6<105.0. In this way, adjusting the material configuration between the lenses can effectively slow down the f-theta distortion caused by the large viewing angle, so that the imaging is not distorted, and the imaging resolution can be effectively improved. Preferably, the following condition can be satisfied: 30.0<V2+V3+V6<90.0.

The refractive index of the first lens is N1, and the refractive index of the second lens is N2, which satisfy the following condition: 3.45<N1+N2<4.50. In this way, adjusting the material configuration of the lens at the object side end of the lens group of the imaging system can help strengthen its ability to adapt to different environments, so that it can still maintain normal operation and good imaging quality in environments with different temperature and humidity changes .

The distance between the aperture and the object-side surface of the third lens on the optical axis is DsR5, and the distance between the aperture and the image-side surface of the third lens on the optical axis is DsR6, which satisfy the following conditions: 0.10<|DsR5/DsR6|<0.85. By adjusting the position of the aperture, an appropriate balance can be achieved between maintaining a sufficient viewing angle and light-receiving rate of the photosensitive element. Preferably, the following condition can be satisfied: 0.10<|DsR5/DsR6|<0.75.

The thickness of the sixth lens on the optical axis is CT6, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which satisfies the following condition: 0.50<CT6/T56<25.0. In this way, adjusting the thickness of the sixth lens on the optical axis and the ratio of the distance between the sixth lens and the fifth lens can facilitate lens molding while taking into account a good assembly yield.

All the technical features in the lens set of the imaging system of the present invention described above can be configured in combination to achieve corresponding effects.

In the lens set of the imaging system provided by the present invention, the material of the lens can be plastic or glass. When the material of the lens is plastic, the production cost can be effectively reduced. In addition, when the material of the lens is glass, the degree of freedom in configuring the refractive power of the lens group of the imaging system can be increased. In addition, the object-side surface and the image-side surface of the imaging system lens group can be aspheric (ASP), and the aspheric surface can be easily made into a shape other than spherical, so as to obtain more control variables to reduce aberrations and reduce lens size. The number used, therefore, can effectively reduce the total length of the lens set of the imaging system of the present invention.

Furthermore, in the imaging system lens set provided by the present invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface can be convex at the near optical axis; if the lens surface is concave and the concave surface is not defined position, it means that the lens surface can be concave at the near optical axis. In the lens set of the imaging system provided by the present invention, if the lens has positive refractive power or negative refractive power, or the focal length of the lens, it may refer to the refractive power or focal length of the lens near the optical axis.

In addition, in the lens set of the imaging system of the present invention, at least one aperture can be provided according to requirements to reduce stray light and improve image quality.

The imaging surface of the lens group of the imaging system of the present invention can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side, depending on the corresponding electronic photosensitive element. In addition, more than one imaging correction element (flat-field element, etc.) can be selectively arranged between the lens closest to the imaging surface in the lens group of the imaging system of the present invention, so as to achieve the effect of image correction (image curvature, etc.). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, surface shape (convex or concave, spherical or aspherical, diffractive surface and Fresnel surface, etc.) can be adjusted according to the requirements of the imaging device. Generally speaking, a preferred configuration of the imaging correction element is that a thin plano-concave element with a concave surface toward the object side is disposed close to the imaging surface.

In the lens set of the imaging system of the present invention, the aperture configuration can be a front aperture or a middle aperture, wherein the front aperture means that the aperture is set between the subject and the first lens, and the middle aperture means that the aperture is set on the first lens and the imaging surface. If the aperture is a front aperture, it can make the exit pupil of the imaging system lens group (Exit Pupil) and the imaging surface have a longer distance, so that it has a telecentric (Telecentric) effect, and can increase the CCD or CMOS reception of the electronic photosensitive element The efficiency of the image; if it is a central aperture, it will help expand the field of view of the system, so that the imaging system lens group has the advantage of a wide-angle lens.

The imaging system lens set of the present invention can also be applied in various aspects to driving recorders, advanced driver assistance systems (ADAS), lane departure warning systems, reversing developing devices, blind spot detection systems, multi-lens devices, drone cameras, and sports cameras , portable video recorders, various smart electronic products, wearable devices, digital cameras, network monitoring equipment and human-computer interaction platforms and other electronic devices.

The present invention provides an image capturing device, comprising the aforementioned imaging system lens group and an electronic photosensitive element, wherein the electronic photosensitive element is arranged on the imaging surface of the imaging system lens group. Through its proper configuration of optical and mechanical components, it can achieve the characteristics of sufficient viewing angle, miniaturization, resistance to environmental changes, and high imaging quality, and then develop into a mass-produced and affordable imaging device for a wider range of products. middle. Preferably, the imaging device may further include a barrel (Barrel Member), a support device (Holder Member) or a combination thereof.

The present invention provides an electronic device, including the aforementioned image capturing device. Thereby, image quality is improved. Preferably, the electronic device may further include a control unit (Control Unit), a display unit (Display), a storage unit (Storage Unit), a random access memory (RAM) or a combination thereof.

According to the above implementation manners, specific embodiments are proposed below and described in detail with reference to the accompanying drawings.

<First embodiment>

Please refer to FIG. 1 and FIG. 2, wherein FIG. 1 shows a schematic diagram of an imaging device according to the first embodiment of the present invention, and FIG. 2 shows the spherical aberration, astigmatism and distortion of the first embodiment in sequence from left to right Graph. As can be seen from FIG. 1 , the imaging device of the first embodiment includes an imaging system lens group (not otherwise labeled) and an electronic photosensitive element 190 . The lens group of the imaging system includes the first lens 110, the second lens 120, the aperture 100, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the filter element 170 from the object side to the image side. And the imaging surface 180, and the electronic photosensitive element 190 is arranged on the imaging surface 180 of the imaging system lens group, wherein the imaging system lens group includes six lenses (110-160), all of which are single and non-cemented lenses, and the first lens 110 There is no other interpolated lens between the sixth lens 160 .

The first lens 110 has negative refractive power and is made of plastic material. The object-side surface 111 is concave near the optical axis, and the image-side surface 112 is concave near the optical axis, both of which are aspherical.

The second lens 120 has a positive refractive power and is made of glass. The object-side surface 121 is convex near the optical axis, and the image-side surface 122 is convex near the optical axis, both of which are spherical.

The third lens 130 has negative refractive power and is made of plastic material. The object-side surface 131 is convex near the optical axis, and the image-side surface 132 is concave near the optical axis, both of which are aspherical.

The fourth lens 140 has positive refractive power and is made of plastic material. The object-side surface 141 is convex near the optical axis, and the image-side surface 142 is concave near the optical axis, both of which are aspherical. In addition, refer to FIG. 19 , which shows a schematic view of the inflection points of the fourth lens 140 and the sixth lens 160 according to the first embodiment of FIG. 1 . It can be seen from FIG. 19 that the image-side surface 142 of the fourth lens includes at least one inflection point IP42.

The fifth lens 150 has positive refractive power and is made of plastic material. The object-side surface 151 is convex near the optical axis, and the image-side surface 152 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 151 of the fifth lens includes a concave surface off-axis.

The sixth lens 160 has negative refractive power and is made of plastic material. The object-side surface 161 is concave near the optical axis, and the image-side surface 162 is convex near the optical axis, both of which are aspherical. In addition, it can be seen from FIG. 19 that both the object-side surface 161 and the image-side surface 162 of the sixth lens include at least one inflection point IP61, IP62.

The filter element 170 is made of glass, which is disposed between the sixth lens 160 and the imaging surface 180 and does not affect the focal length of the lens group of the imaging system.

The curve equations of the aspheric surfaces of the above-mentioned lenses are expressed as follows:

in:

X: The point on the aspheric surface whose distance from the optical axis is Y, and its relative distance from the intersection point tangent to the aspheric optical axis;

Y: The vertical distance between the point on the aspheric curve and the optical axis;

R: radius of curvature;

k: cone coefficient; and

Ai: i-th order aspheric coefficient.

In the imaging system lens group of the first embodiment, the focal length of the imaging system lens group is f, the aperture value (f-number) of the imaging system lens group is Fno, half of the maximum viewing angle in the imaging system lens group is HFOV, and its numerical value is as follows : f = 3.05 mm; Fno = 2.15; and HFOV = 65.5 degrees.

In the imaging system lens set of the first embodiment, half of the maximum viewing angle in the imaging system lens set is HFOV, which satisfies the following condition: 1/|tan(HFOV)|=0.46.

In the imaging system lens group of the first embodiment, the dispersion coefficient of the second lens 120 is V2, the dispersion coefficient of the third lens 130 is V3, and the dispersion coefficient of the sixth lens 160 is V6, which satisfy the following conditions: V3=23.5; And V2+V3+V6=80.8.

In the lens set of the imaging system of the first embodiment, the refractive index of the first lens 110 is N1, and the refractive index of the second lens 120 is N2, which satisfy the following condition: N1+N2=3.193.

In the imaging system lens group of the first embodiment, the radius of curvature of the object-side surface 121 of the second lens is R3, the radius of curvature of the image-side surface 122 of the second lens is R4, and the radius of curvature of the object-side surface 131 of the third lens is R5, The radius of curvature of the third lens image side surface 132 is R6, the radius of curvature of the fourth lens object side surface 141 is R7, and the radius of curvature of the fourth lens image side surface 142 is R8, which meets the following conditions: (R3-R4)/ (R3+R4)=1.71; (R4+R5)/(R4-R5)=0.34; (R5+R6)/(R5-R6)=3.25; (R4+R6)/(R4-R6)=0.59; And (R7+R8)/(R7-R8)=-1.22.

In the imaging system lens group of the first embodiment, the thickness of the sixth lens 160 on the optical axis is CT6, and the distance between the fifth lens 150 and the sixth lens 160 on the optical axis is T56, which satisfies the following conditions: CT6/ T56 = 2.23.

In the imaging system lens group of the first embodiment, the focal length of the imaging system lens group is f, and the distance on the optical axis from the object side surface 111 of the first lens to the imaging surface 180 is TL, which satisfies the following conditions: f/TL=0.17 .

In the imaging system lens group of the first embodiment, the focal length of the fifth lens 150 is f5, the thickness of the second lens 120 on the optical axis is CT2, and the distance between the first lens 110 and the second lens 120 on the optical axis is T12, which satisfies the following conditions: f5/CT2=0.72; f5/T12=1.38; and f5/CT2+f5/T12=2.10.

In the imaging system lens group of the first embodiment, the integrated focal length of the lens between the subject and the aperture 100 is fG1 (in the first embodiment, it is the integrated focal length of the first lens 110 and the second lens 120), and the aperture 100 to The integrated focal length of the lenses between the imaging planes 180 is fG2 (in the first embodiment, it is the integrated focal length of the third lens 130, the fourth lens 140, the fifth lens 150 and the sixth lens 160), which satisfies the following conditions: fG2/ fG1 = 0.05.

In the imaging system lens group of the first embodiment, the distance from the sixth lens image side surface 162 to the imaging surface 180 on the optical axis is BL, and the thickness of the second lens 120 on the optical axis is CT2, which satisfies the following conditions: BL /CT2=0.54.

In the imaging system lens group of the first embodiment, the refractive power of the third lens 130 is P3 (that is, the ratio f/f3 of the focal length f of the imaging system lens group to the focal length f3 of the third lens 130), and the refractive power of the fourth lens 140 is The force is P4 (that is, the ratio f/f4 of the focal length f of the lens group of the imaging system to the focal length f4 of the fourth lens 140), and the refractive power of the fifth lens 150 is P5 (that is, the focal length f of the lens group of the imaging system is equal to the focal length f4 of the fifth lens 150). The ratio f/f5 of the focal length f5 of the sixth lens 160), the refractive power of the sixth lens 160 is P6 (that is, the ratio f/f6 of the focal length f of the imaging system lens group to the focal length f6 of the sixth lens 160), which satisfies the following conditions: (| P3|+|P4|+|P6|)/|P5|=0.97.

In the imaging system lens group of the first embodiment, the distance between the aperture 100 and the object-side surface 131 of the third lens on the optical axis is DsR5, and the distance between the aperture 100 and the image-side surface 132 of the third lens on the optical axis is DsR6, which The following condition is satisfied: |DsR5/DsR6|=0.51.

Then refer to Table 1 and Table 2 below.

Table 1 shows the detailed structural data of the first embodiment in FIG. 1 , where the units of the radius of curvature, thickness and focal length are mm, and surfaces 0-16 represent surfaces from the object side to the image side in sequence. Table 2 shows the aspheric surface data in the first embodiment, wherein k represents the cone coefficient in the aspheric curve equation, and A4-A16 represent the 4th-16th order aspheric coefficients of each surface. In addition, the tables of the following embodiments are schematic diagrams and aberration curve diagrams corresponding to the respective embodiments, and the definitions of the data in the tables are the same as those in Table 1 and Table 2 of the first embodiment, and will not be repeated here.

<Second Embodiment>

Please refer to FIG. 3 and FIG. 4, wherein FIG. 3 shows a schematic diagram of an imaging device according to the second embodiment of the present invention, and FIG. 4 shows the spherical aberration, astigmatism and distortion of the second embodiment in sequence from left to right Graph. As can be seen from FIG. 3 , the image capturing device of the second embodiment includes an imaging system lens group (not otherwise labeled) and an electronic photosensitive element 290 . The lens group of the imaging system includes the first lens 210, the second lens 220, the aperture 200, the third lens 230, the fourth lens 240, the fifth lens 250, the sixth lens 260, and the filter element 270 from the object side to the image side. And the imaging surface 280, and the electronic photosensitive element 290 is arranged on the imaging surface 280 of the imaging system lens group, wherein the imaging system lens group includes six lenses (210-260), all of which are single and non-cemented lenses, and the first lens 210 There is no other interpolated lens between the sixth lens 260 .

The first lens 210 has negative refractive power and is made of glass. The object-side surface 211 is convex near the optical axis, and the image-side surface 212 is concave near the optical axis, both of which are spherical.

The second lens 220 has a positive refractive power and is made of plastic material. The object-side surface 221 is convex near the optical axis, and the image-side surface 222 is convex near the optical axis, both of which are aspherical.

The third lens 230 has negative refractive power and is made of plastic material. The object-side surface 231 is concave near the optical axis, and the image-side surface 232 is concave near the optical axis, both of which are aspherical.

The fourth lens 240 has a positive refractive power and is made of plastic material. The object-side surface 241 is convex near the optical axis, and the image-side surface 242 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 241 and the image-side surface 242 of the fourth lens include at least one inflection point.

The fifth lens 250 has positive refractive power and is made of plastic material. The object-side surface 251 is convex near the optical axis, and the image-side surface 252 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 251 of the fifth lens includes a concave surface off-axis.

The sixth lens 260 has positive refractive power and is made of plastic material. The object-side surface 261 is concave near the optical axis, and the image-side surface 262 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 261 and the image-side surface 262 of the sixth lens include at least one inflection point.

The filter element 270 is made of glass, which is disposed between the sixth lens 260 and the imaging surface 280 and does not affect the focal length of the lens group of the imaging system.

Then refer to Table 3 and Table 4 below.

In the second embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 3 and Table 4, the following data can be deduced:

<Third Embodiment>

Please refer to FIG. 5 and FIG. 6, wherein FIG. 5 shows a schematic diagram of an imaging device according to the third embodiment of the present invention, and FIG. 6 shows the spherical aberration, astigmatism and distortion of the third embodiment in sequence from left to right Graph. As can be seen from FIG. 5 , the image capturing device of the third embodiment includes an imaging system lens group (not labeled separately) and an electronic photosensitive element 390 . The lens group of the imaging system includes first lens 310, second lens 320, aperture 300, third lens 330, fourth lens 340, diaphragm 301, fifth lens 350, sixth lens 360, The filter element 370 and the imaging surface 380, and the electronic photosensitive element 390 is arranged on the imaging surface 380 of the imaging system lens group, wherein the imaging system lens group includes six lenses (310-360), all of which are single and non-cemented lenses, and There is no other interpolated lens between the first lens 310 and the sixth lens 360 .

The first lens 310 has negative refractive power and is made of glass. The object-side surface 311 is convex near the optical axis, and the image-side surface 312 is concave near the optical axis, both of which are spherical.

The second lens 320 has a positive refractive power and is made of glass. The object-side surface 321 is concave near the optical axis, and the image-side surface 322 is convex near the optical axis, both of which are spherical.

The third lens 330 has negative refractive power and is made of plastic material. The object-side surface 331 is convex near the optical axis, and the image-side surface 332 is concave near the optical axis, both of which are aspherical.

The fourth lens 340 has positive refractive power and is made of plastic material. The object-side surface 341 is convex near the optical axis, and the image-side surface 342 is concave near the optical axis, both of which are aspherical. In addition, the image-side surface 342 of the fourth lens includes at least one inflection point.

The fifth lens 350 has positive refractive power and is made of plastic material. The object-side surface 351 is convex near the optical axis, and the image-side surface 352 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 351 of the fifth lens includes a concave surface off-axis.

The sixth lens 360 has negative refractive power and is made of plastic material. The object-side surface 361 is concave near the optical axis, and the image-side surface 362 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 361 and the image-side surface 362 of the sixth lens include at least one inflection point.

The filter element 370 is made of glass, which is disposed between the sixth lens 360 and the imaging surface 380 and does not affect the focal length of the lens group of the imaging system.

Then refer to Table 5 and Table 6 below.

In the third embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 5 and Table 6, the following data can be deduced:

<Fourth Embodiment>

Please refer to FIG. 7 and FIG. 8, wherein FIG. 7 shows a schematic diagram of an imaging device according to the fourth embodiment of the present invention, and FIG. 8 shows the spherical aberration, astigmatism and distortion of the fourth embodiment in sequence from left to right Graph. As can be seen from FIG. 7 , the image capturing device of the fourth embodiment includes an imaging system lens group (not another number) and an electronic photosensitive element 490 . The lens group of the imaging system includes the first lens 410, the second lens 420, the aperture 400, the third lens 430, the fourth lens 440, the diaphragm 401, the fifth lens 450, the sixth lens 460, The filter element 470 and the imaging surface 480, and the electronic photosensitive element 490 is arranged on the imaging surface 480 of the imaging system lens group, wherein the imaging system lens group includes six lenses (410-460), all of which are single and non-cemented lenses, and There is no other interpolated lens between the first lens 410 and the sixth lens 460 .

The first lens 410 has negative refractive power and is made of glass. The object-side surface 411 is convex near the optical axis, and the image-side surface 412 is concave near the optical axis, both of which are spherical.

The second lens 420 has a positive refractive power and is made of glass. The object-side surface 421 is convex near the optical axis, and the image-side surface 422 is convex near the optical axis, both of which are spherical.

The third lens 430 has negative refractive power and is made of plastic material. The object-side surface 431 is convex near the optical axis, and the image-side surface 432 is concave near the optical axis, both of which are aspherical.

The fourth lens 440 has positive refractive power and is made of plastic material. The object-side surface 441 is convex near the optical axis, and the image-side surface 442 is convex near the optical axis. Both are aspherical. In addition, the image-side surface 442 of the fourth lens includes at least one inflection point.

The fifth lens 450 has positive refractive power and is made of plastic material. The object-side surface 451 is convex near the optical axis, and the image-side surface 452 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 451 of the fifth lens includes a concave surface off-axis.

The sixth lens 460 has negative refractive power and is made of plastic material. The object-side surface 461 is concave near the optical axis, and the image-side surface 462 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 461 and the image-side surface 462 of the sixth lens include at least one inflection point.

The filter element 470 is made of glass, which is disposed between the sixth lens 460 and the imaging surface 480 and does not affect the focal length of the lens group of the imaging system.

Then refer to Table 7 and Table 8 below.

In the fourth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 7 and Table 8, the following data can be deduced:

<Fifth Embodiment>

Please refer to FIG. 9 and FIG. 10, wherein FIG. 9 shows a schematic diagram of an imaging device according to the fifth embodiment of the present invention, and FIG. 10 shows the spherical aberration, astigmatism and distortion of the fifth embodiment in sequence from left to right Graph. As can be seen from FIG. 9 , the imaging device of the fifth embodiment includes an imaging system lens group (not labeled separately) and an electronic photosensitive element 590 . The lens group of the imaging system includes first lens 510, second lens 520, aperture 500, third lens 530, fourth lens 540, diaphragm 501, fifth lens 550, sixth lens 560, The filter element 570 and the imaging surface 580, and the electronic photosensitive element 590 is arranged on the imaging surface 580 of the imaging system lens group, wherein the imaging system lens group includes six lenses (510-560), all of which are single and non-cemented lenses, and There is no other interpolated lens between the first lens 510 and the sixth lens 560 .

The first lens 510 has negative refractive power and is made of glass. The object-side surface 511 is convex near the optical axis, and the image-side surface 512 is concave near the optical axis, both of which are spherical.

The second lens 520 has a positive refractive power and is made of glass. The object-side surface 521 is convex near the optical axis, and the image-side surface 522 is convex near the optical axis, both of which are spherical.

The third lens 530 has negative refractive power and is made of plastic material. The object-side surface 531 is convex near the optical axis, and the image-side surface 532 is concave near the optical axis, both of which are aspherical.

The fourth lens 540 has positive refractive power and is made of plastic material. The object-side surface 541 is convex near the optical axis, and the image-side surface 542 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 541 and the image-side surface 542 of the fourth lens include at least one inflection point.

The fifth lens 550 has positive refractive power and is made of plastic material. The object-side surface 551 is convex near the optical axis, and the image-side surface 552 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 551 of the fifth lens includes a concave surface off-axis.

The sixth lens 560 has negative refractive power and is made of plastic material. The object-side surface 561 is concave near the optical axis, and the image-side surface 562 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 561 and the image-side surface 562 of the sixth lens include at least one inflection point.

The filter element 570 is made of glass, which is disposed between the sixth lens 560 and the imaging surface 580 and does not affect the focal length of the lens group of the imaging system.

Then refer to Table 9 and Table 10 below.

In the fifth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 9 and Table 10, the following data can be deduced:

<Sixth Embodiment>

Please refer to FIG. 11 and FIG. 12 , wherein FIG. 11 shows a schematic diagram of an imaging device according to the sixth embodiment of the present invention, and FIG. 12 shows the spherical aberration, astigmatism and distortion of the sixth embodiment in sequence from left to right Graph. It can be seen from FIG. 11 that the image capturing device of the sixth embodiment includes an imaging system lens group (not another number) and an electronic photosensitive element 690 . The lens group of the imaging system includes the first lens 610, the second lens 620, the aperture 600, the third lens 630, the fourth lens 640, the fifth lens 650, the sixth lens 660, and the filter element 670 from the object side to the image side. And the imaging surface 680, and the electronic photosensitive element 690 is arranged on the imaging surface 680 of the imaging system lens group, wherein the imaging system lens group includes six lenses (610-660), all of which are single and non-cemented lenses, and the first lens 610 There is no other interpolated lens between the sixth lens 660 .

The first lens 610 has negative refractive power and is made of glass. The object-side surface 611 is convex near the optical axis, and the image-side surface 612 is concave near the optical axis, both of which are spherical.

The second lens 620 has a positive refractive power and is made of glass. The object-side surface 621 is concave near the optical axis, and the image-side surface 622 is convex near the optical axis, both of which are spherical.

The third lens 630 has negative refractive power and is made of plastic material. The object-side surface 631 is convex near the optical axis, and the image-side surface 632 is concave near the optical axis, both of which are aspherical.

The fourth lens 640 has negative refractive power and is made of plastic material. The object-side surface 641 is concave near the optical axis, and the image-side surface 642 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 641 and the image-side surface 642 of the fourth lens include at least one inflection point.

The fifth lens 650 has positive refractive power and is made of plastic material. The object-side surface 651 is convex near the optical axis, and the image-side surface 652 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 651 of the fifth lens includes a concave surface off-axis.

The sixth lens 660 has negative refractive power and is made of plastic material. The object-side surface 661 is concave near the optical axis, and the image-side surface 662 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 661 and the image-side surface 662 of the sixth lens include at least one inflection point.

The filter element 670 is made of glass, which is disposed between the sixth lens 660 and the imaging surface 680 and does not affect the focal length of the lens group of the imaging system.

Then refer to Table 11 and Table 12 below.

In the sixth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 11 and Table 12, the following data can be calculated:

<Seventh Embodiment>

Please refer to FIG. 13 and FIG. 14, wherein FIG. 13 shows a schematic diagram of an imaging device according to the seventh embodiment of the present invention, and FIG. 14 shows the spherical aberration, astigmatism and distortion of the seventh embodiment in sequence from left to right Graph. As can be seen from FIG. 13 , the imaging device of the seventh embodiment includes an imaging system lens group (not otherwise labeled) and an electronic photosensitive element 790 . The lens group of the imaging system includes a first lens 710, a second lens 720, an aperture 700, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, and a filter element 770 from the object side to the image side. And the imaging surface 780, and the electronic photosensitive element 790 is arranged on the imaging surface 780 of the imaging system lens group, wherein the imaging system lens group includes six lenses (710-760), all of which are single and non-cemented lenses, and the first lens 710 There is no other interpolated lens between the sixth lens 760 .

The first lens 710 has negative refractive power and is made of plastic material. The object-side surface 711 is convex near the optical axis, and the image-side surface 712 is concave near the optical axis, both of which are aspherical.

The second lens 720 has positive refractive power and is made of plastic material. The object-side surface 721 is concave near the optical axis, and the image-side surface 722 is convex near the optical axis, both of which are aspherical.

The third lens 730 has negative refractive power and is made of plastic material. The object-side surface 731 is convex near the optical axis, and the image-side surface 732 is concave near the optical axis, both of which are aspherical.

The fourth lens 740 has positive refractive power and is made of plastic material. The object-side surface 741 is convex near the optical axis, and the image-side surface 742 is concave near the optical axis, both of which are aspherical. In addition, the image-side surface 742 of the fourth lens includes at least one inflection point.

The fifth lens 750 has positive refractive power and is made of plastic material. The object-side surface 751 is convex near the optical axis, and the image-side surface 752 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 751 of the fifth lens includes a concave surface off-axis.

The sixth lens 760 has a negative refractive power and is made of plastic material. Its object-side surface 761 is concave near the optical axis, and its image-side surface 762 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 761 and the image-side surface 762 of the sixth lens include at least one inflection point.

The filter element 770 is made of glass, which is disposed between the sixth lens 760 and the imaging surface 780 and does not affect the focal length of the lens group of the imaging system.

Then refer to Table 13 and Table 14 below.

In the seventh embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 13 and Table 14, the following data can be calculated:

<Eighth embodiment>

Please refer to FIG. 15 and FIG. 16, wherein FIG. 15 shows a schematic diagram of an imaging device according to the eighth embodiment of the present invention, and FIG. 16 shows the spherical aberration, astigmatism and distortion of the eighth embodiment in order from left to right Graph. It can be seen from FIG. 15 that the image capturing device of the eighth embodiment includes an imaging system lens group (not another number) and an electronic photosensitive element 890 . The lens group of the imaging system includes a first lens 810, a second lens 820, an aperture 800, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, and a filter element 870 from the object side to the image side. And the imaging surface 880, and the electronic photosensitive element 890 is arranged on the imaging surface 880 of the imaging system lens group, wherein the imaging system lens group includes six lenses (810-860), all of which are single and non-cemented lenses, and the first lens 810 There are no other interpolated lenses between the sixth lens 860 .

The first lens 810 has negative refractive power and is made of plastic material. The object-side surface 811 is concave near the optical axis, and the image-side surface 812 is concave near the optical axis, both of which are aspherical.

The second lens 820 has a positive refractive power and is made of plastic material. Its object-side surface 821 is concave near the optical axis, and its image-side surface 822 is convex near the optical axis, both of which are aspherical.

The third lens 830 has negative refractive power and is made of plastic material. The object-side surface 831 is convex near the optical axis, and the image-side surface 832 is concave near the optical axis, both of which are aspherical.

The fourth lens 840 has negative refractive power and is made of plastic material. The object-side surface 841 is concave near the optical axis, and the image-side surface 842 is concave near the optical axis, both of which are aspherical. In addition, both the object-side surface 841 and the image-side surface 842 of the fourth lens include at least one inflection point.

The fifth lens 850 has a positive refractive power and is made of plastic material. Its object side surface 851 is convex near the optical axis, and its image side surface 852 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 851 of the fifth lens includes at least one concave surface off-axis.

The sixth lens 860 has a negative refractive power and is made of plastic material. Its object side surface 861 is concave near the optical axis, and its image side surface 862 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 861 and the image-side surface 862 of the sixth lens include at least one inflection point.

The filter element 870 is made of glass, which is disposed between the sixth lens 860 and the imaging surface 880 and does not affect the focal length of the lens group of the imaging system.

Then refer to Table 15 and Table 16 below.

In the eighth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 15 and Table 16, the following data can be calculated:

<Ninth Embodiment>

Please refer to FIG. 17 and FIG. 18, wherein FIG. 17 shows a schematic diagram of an imaging device according to the ninth embodiment of the present invention, and FIG. 18 shows the spherical aberration, astigmatism and distortion of the ninth embodiment in sequence from left to right Graph. It can be seen from FIG. 17 that the image capturing device of the ninth embodiment includes an imaging system lens group (not another number) and an electronic photosensitive element 990 . The lens group of the imaging system includes the first lens 910, the second lens 920, the aperture 900, the third lens 930, the fourth lens 940, the fifth lens 950, the sixth lens 960, and the filter element 970 from the object side to the image side. And the imaging surface 980, and the electronic photosensitive element 990 is arranged on the imaging surface 980 of the imaging system lens group, wherein the imaging system lens group includes six lenses (910-960), all of which are single and non-cemented lenses, and the first lens 910 There is no other interpolated lens between the sixth lens 960 .

The first lens 910 has negative refractive power and is made of glass. The object-side surface 911 is convex near the optical axis, and the image-side surface 912 is concave near the optical axis, both of which are spherical.

The second lens 920 has positive refractive power and is made of plastic material. The object-side surface 921 is convex near the optical axis, and the image-side surface 922 is convex near the optical axis, both of which are aspherical.

The third lens 930 has negative refractive power and is made of plastic material. The object-side surface 931 is concave near the optical axis, and the image-side surface 932 is concave near the optical axis, both of which are aspherical.

The fourth lens 940 has positive refractive power and is made of plastic material. The object-side surface 941 is convex near the optical axis, and the image-side surface 942 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 941 and the image-side surface 942 of the fourth lens include at least one inflection point.

The fifth lens 950 has positive refractive power and is made of plastic material. Its object-side surface 951 is convex near the optical axis, and its image-side surface 952 is convex near the optical axis, both of which are aspherical. In addition, the object-side surface 951 of the fifth lens includes at least one concave surface off-axis.

The sixth lens 960 has a positive refractive power and is made of plastic material. Its object-side surface 961 is concave near the optical axis, and its image-side surface 962 is convex near the optical axis, both of which are aspherical. In addition, both the object-side surface 961 and the image-side surface 962 of the sixth lens include at least one inflection point.

The filter element 970 is made of glass, which is disposed between the sixth lens 960 and the imaging surface 980 and does not affect the focal length of the lens group of the imaging system.

Then refer to Table 17 and Table 18 below.

In the ninth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. In addition, the definitions of the parameters in the table below are the same as those in the first embodiment, and will not be repeated here.

Cooperating with Table 17 and Table 18, the following data can be calculated:

<Tenth Embodiment>

Please refer to FIG. 20 , which is a schematic diagram illustrating an electronic device 10 according to a tenth embodiment of the present invention. The electronic device 10 of the tenth embodiment is a reverse developing device. The electronic device 10 includes an image-taking device 11, and the image-taking device 11 includes an imaging system lens group (not shown in the figure) and an electronic photosensitive element (not shown in the figure) according to the present invention. , wherein the electronic photosensitive element is arranged on the imaging surface of the lens group of the imaging system.

In addition, in addition to the above-mentioned electronic device being used in the driving system as a reversing developing device and installed behind the vehicle, it can also be used as other sensing developing devices, installed in the front, on both sides or any position that can sense changes in the external environment , and design imaging devices with different viewing angles according to the distance, position, and range to be sensed, and then judge the environmental changes through software calculations, so as to achieve automatic driving or driving assistance. It can also be further combined with long-distance communication, radar, and automatic high beams. Control, blind spot detection, pedestrian detection, smart braking, traffic sign recognition, GPS, etc., thereby improving driving safety and life convenience. At the same time, in order for the electronic device to be used normally in various environments (such as temperature changes and external force collisions, etc.), the imaging device has the characteristics of high-temperature and corrosion-resistant materials and high-strength structures.

<Eleventh embodiment>

Please refer to FIG. 21 , which is a schematic diagram illustrating an electronic device 20 according to an eleventh embodiment of the present invention. The electronic device 20 of the eleventh embodiment is a driving recorder, and the electronic device 20 includes an image-taking device 21, and the image-taking device 21 includes an imaging system lens group (not shown in the figure) and an electronic photosensitive element (not shown in the figure) according to the present invention. ), wherein the electronic photosensitive element is arranged on the imaging surface of the lens group of the imaging system.

<Twelfth embodiment>

Please refer to FIG. 22 , which is a schematic diagram illustrating an electronic device 30 according to a twelfth embodiment of the present invention. The electronic device 30 of the twelfth embodiment is a safety monitoring device. The electronic device 30 includes an image-taking device 31, and the image-taking device 31 includes an imaging system lens group (not shown in the figure) and an electronic photosensitive element (not shown in the figure) according to the present invention. ), wherein the electronic photosensitive element is arranged on the imaging surface of the lens group of the imaging system.

Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Any skilled person can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be based on the scope defined by the appended claims.

Claims (31)

1. An imaging system lens group is characterized in that it comprises six lenses, and the six lenses are sequentially from the object side to the image side: a first lens with negative refractive power; a second lens with positive refractive power; a third lens with negative refractive power; a fourth lens; a fifth lens having positive refractive power; and a sixth lens; Wherein the focal length of the fifth lens is f5, the thickness of the second lens on the optical axis is CT2, the radius of curvature of the image-side surface of the second lens is R4, and the radius of curvature of the object-side surface of the third lens is R5, which Meet the following conditions: 0.10<f5/CT2<1.20; and (R4+R5)/(R4-R5)<0.75. 2 . The imaging system lens set according to claim 1 , wherein the image-side surface of the second lens is convex near the optical axis, and at least one surface of the fourth lens includes at least one inflection point. 3 . 3. The imaging system lens group according to claim 1, characterized in that, the near optical axis of the sixth lens image side surface is a convex surface, the radius of curvature of the second lens image side surface is R4, and the third lens image The radius of curvature of the side surface is R6, which satisfies the following conditions: 0.15<(R4+R6)/(R4-R6)<0.75. 4. The imaging system lens group according to claim 1, wherein the focal length of the fifth lens is f5, the thickness of the second lens on the optical axis is CT2, and it satisfies the following conditions: 0.20<f5/CT2<0.90. 5. The imaging system lens set according to claim 1, wherein at least three of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens The other is made of plastic material, the radius of curvature of the image-side surface of the second lens is R4, and the curvature radius of the object-side surface of the third lens is R5, which satisfy the following conditions: -3.0<(R4+R5)/(R4-R5)<0.50. 6. The imaging system lens set according to claim 1, wherein the focal length of the fifth lens is f5, the thickness of the second lens on the optical axis is CT2, and the first lens and the second lens are at The separation distance on the optical axis is T12, which satisfies the following conditions: 0.30<f5/CT2+f5/T12<3.50. 7. The imaging system lens set according to claim 1, characterized in that, the object-side surface of the fifth lens is convex near the optical axis and includes at least one concave surface off-axis, half of the maximum viewing angle in the imaging system lens set For HFOV, it satisfies the following conditions: 1/|tan(HFOV)|<1.20. 8. The imaging system lens set according to claim 1, further comprising: An aperture, wherein the integrated focal length of the lens between an object and the aperture is fG1, the integrated focal length of the lens between the aperture and an imaging plane is fG2, the focal length of the lens group of the imaging system is f, and the object side surface of the first lens The distance to the imaging surface on the optical axis is TL, which satisfies the following conditions: 0<fG2/fG1<2.0; and 0<f/TL<0.20. 9. The imaging system lens set according to claim 1, further comprising: An aperture, which is arranged in the object side direction of the third lens, wherein the aperture value of the imaging system lens group is Fno, which meets the following conditions: 1.0<Fno<3.0. 10. The imaging system lens set according to claim 1, wherein the dispersion coefficient of the third lens is V3, which satisfies the following conditions: 10.0<V3<30.0. 11. An imaging system lens group, characterized in that it comprises six lenses, and the six lenses are in sequence from the object side to the image side: a first lens with negative refractive power; a second lens with positive refractive power; a third lens; a fourth lens; a fifth lens having positive refractive power; and A sixth lens, the near optical axis of the image side surface is convex; Wherein the focal length of the fifth lens is f5, the thickness of the second lens on the optical axis is CT2, the radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6. The radius of curvature of the object-side surface of the fourth lens is R7, and the radius of curvature of the image-side surface of the fourth lens is R8, which meets the following conditions: 0.10<f5/CT2<1.40; 0.45<(R5+R6)/(R5-R6); and (R7+R8)/(R7-R8)<1.50. 12 . The imaging system lens set according to claim 11 , wherein at least one surface of the sixth lens element includes at least one inflection point. 13 . 13 . The imaging system lens set according to claim 11 , wherein the image-side surface of the third lens is concave near the optical axis, and the object-side surface of the sixth lens is concave near the optical axis. 14 . 14. The imaging system lens group according to claim 11, wherein the third lens has a negative refractive power, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is is R4, which satisfies the following conditions: 0<(R3-R4)/(R3+R4)<2.20. 15. The imaging system lens group according to claim 11, wherein the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, and the object-side surface of the fourth lens is R6. The radius of curvature of the surface is R7, and the radius of curvature of the image side surface of the fourth lens is R8, which satisfies the following conditions: 1.0<(R5+R6)/(R5-R6)<4.50; and -5.0<(R7+R8)/(R7-R8)<0.75. 16. The imaging system lens set according to claim 11, wherein the focal length of the fifth lens is f5, the distance between the first lens and the second lens on the optical axis is T12, and it satisfies the following conditions : 0.30<f5/T12<2.50. 17. The imaging system lens set according to claim 11, wherein the distance from the image-side surface of the sixth lens to an imaging surface on the optical axis is BL, and the thickness of the second lens on the optical axis is CT2 , which satisfy the following conditions: 0<BL/CT2<0.75. 18. The imaging system lens set according to claim 11, wherein the refractive power of the third lens is P3, the refractive power of the fourth lens is P4, the refractive power of the fifth lens is P5, and the refractive power of the fourth lens is P5. The refractive power of the six lenses is P6, the focal length of the lens group of the imaging system is f, and the distance from the object side surface of the first lens to an imaging surface on the optical axis is TL, which satisfies the following conditions: (|P3|+|P4|+|P6|)/|P5|<2.50; and 0<f/TL<0.20. 19. The imaging system lens group according to claim 11, wherein half of the maximum viewing angle in the imaging system lens group is HFOV, and the aperture value of the imaging system lens group is Fno, which meets the following conditions: 1/|tan(HFOV)|<0.85; and 1.0<Fno<2.40. 20. The imaging system lens set according to claim 11, wherein the dispersion coefficient of the second lens is V2, the dispersion coefficient of the third lens is V3, and the dispersion coefficient of the sixth lens is V6, which satisfies The following conditions: 30.0<V2+V3+V6<90.0. 21. The imaging system lens set according to claim 11, wherein the refractive index of the first lens is N1, and the refractive index of the second lens is N2, which satisfy the following conditions: 3.45<N1+N2<4.50. 22. The imaging system lens set according to claim 11, further comprising: An aperture, wherein the distance between the aperture and the object-side surface of the third lens on the optical axis is DsR5, the distance between the aperture and the image-side surface of the third lens on the optical axis is DsR6, and the distance between a subject and the aperture The integrated focal length of the lens is fG1, and the integrated focal length of the lens between the aperture and an imaging plane is fG2, which meets the following conditions: 0.10<|DsR5/DsR6|<0.85; and 0<fG2/fG1<1.0. 23. An imaging device, characterized in that it comprises: The imaging system lens set of claim 11; and An electronic photosensitive element is arranged on an imaging surface of the lens group of the imaging system. 24. An electronic device, characterized in that it comprises: The imaging device as claimed in claim 23. 25. An imaging system lens group, characterized in that it comprises six lenses, and the six lenses are in sequence from the object side to the image side: a first lens with negative refractive power; a second lens with positive refractive power; a third lens with negative refractive power; a fourth lens; a fifth lens having positive refractive power; and a sixth lens; The radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, the focal length of the fifth lens is f5, and the thickness of the second lens on the optical axis is CT2. The distance between the first lens and the second lens on the optical axis is T12, which satisfies the following conditions: -3.50<(R5+R6)/(R5-R6); and 0.50<f5/CT2+f5/T12<2.50. 26. The imaging system lens set according to claim 25, wherein the fourth lens has a positive refractive power, its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. 27. The imaging system lens group according to claim 25, wherein the radius of curvature of the object-side surface of the third lens is R5, the radius of curvature of the image-side surface of the third lens is R6, and the sixth lens is The thickness on the axis is CT6, and the distance between the fifth lens and the sixth lens on the optical axis is T56, which satisfies the following conditions: -0.30<(R5+R6)/(R5-R6); and 0.50<CT6/T56<25.0. 28. The imaging system lens group according to claim 25, wherein the radius of curvature of the second lens image-side surface is R4, the radius of curvature of the third lens image-side surface is R6, and it satisfies the following conditions: -0.30<(R4+R6)/(R4-R6)<0.75. 29. The imaging system lens set according to claim 25, wherein at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens At least one surface thereof includes at least one inflection point, half of the maximum viewing angle in the lens group of the imaging system is HFOV, and it satisfies the following conditions: 1/|tan(HFOV)|<0.70. 30. The imaging system lens set according to claim 25, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are all single and non-cemented lenses; The imaging system lens group also includes an aperture, wherein the distance between the aperture and the object-side surface of the third lens on the optical axis is DsR5, and the distance between the aperture and the image-side surface of the third lens on the optical axis is DsR6, which Meet the following conditions: 0.10<|DsR5/DsR6|<0.75. 31. The imaging system lens set according to claim 25, wherein the dispersion coefficient of the second lens is V2, the dispersion coefficient of the third lens is V3, and the dispersion coefficient of the sixth lens is V6, which satisfies The following conditions: 30.0<V2+V3+V6<105.0.